Lesson Plan: 4C.1.02

Hamble Lesson Observation Plan
Learning About
What happens to the atoms in a chemical reaction?
Keywords:
  • Chemical reaction: A process in which one or more substances, the reactants, are converted to one or more different substances, the products. (4)
  • Atom: The smallest particle of an element that can exist either alone or in combination. (2)
  • Chemical formulae: A formula that gives the total number of atoms of each element in each molecule of a substance (1)
  • Symbol Equation: The symbolic representation of a chemical reaction, wherein the reactant(s) are given on the left-hand side and the product(s) on the right-hand side. (1)
  • Conservation of mass (1)
  • Precipitate (1)
  • Chemical reaction: A process in which one or more substances, the reactants, are converted to one or more different substances, the products. (1)
  • Gas: Particles are spread apart and move about randomly. So they have high amounts of kinetic energy but attraction between particles is weak. (1)
  • Word Equation: is a chemical reaction expressed in words rather than chemical formulas. A word equation should state the reactants (starting materials), products (ending materials), and direction of the reaction in a form that could be used to write a chemical equation. (1)
Memory Anchor:
Method Precise Learning Objective Linked Question / Activity
(Designed for maximum working out)		 Stepping Stones Pitstop Check
(Thinking Map)
D Chemical reactions result from the rearrangement of atoms What happens to atoms in chemical reactions

Demo: Lead Iodide and Potassium Nitrate . Discuss (Think-Pair-Share) what is happening using vocab and ideas from previous lesson.
W Learn the signs of chemical reactions: 1. Change of colour 2. Formation of gas 3. Formation of precipitate 4. Change of temperature (energy released) What 4 things tell us a chemical reaction has occurred?
A Representing chemical reactions using word equations.

Complete the following word equation: Lead Iodide 'plus' Potassium Nitrate 'becomes' ->
D There is a 'Conservation of mass' during chemical reactions as atoms are rearranged not destroyed. How do we know that there is conservation of mass in a chemical reaction?

Lead Iodide and Potassium Nitrate: http://www.rsc.org/learn-chemistry/content/filerepository/CMP/00/000/515/cce-61.pdf
Representing chemical reactions using formulae and using equations.

Draw particle diagram for reaction under word equation. Write symbol equation using formulae under particle diagram.
Links To the Big Ideas
ForcesParticlesEnergyCells